package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
		//对前端传入进来的明文密码进行md5解密
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //对象属性拷贝  参数列表是从前面拷贝到后面
        BeanUtils.copyProperties(employeeDTO,employee);
        //因为后面对象明显属性多，所以需要将未被拷贝的手动设置
        //设置账号的状态
        employee.setStatus(StatusConstant.ENABLE);
        //设置密码(需要将传入进来的密码进行加密，并且数据库存入的也应该是加密后的)
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //设置时间创建时间和修改时间
        /*employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        //设置创建人ID和修改人ID
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        //调用Mapper方法
        employeeMapper.insert(employee);
    }

    /**
     * 员工分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.page(employeePageQueryDTO);
        long total = page.getTotal();
        List<Employee> result = page.getResult();
        return new PageResult(total,result);
    }

    /**
     * 根据ID启用禁用员工状态
     * @param status
     * @param id
     */
    @Override
    public void statusID(Integer status, Long id) {
        Employee employee = new Employee();
        employee.setStatus(status);
        employee.setId(id);
        //TODO 新增非管理员不能修改员工状态，因前端将提示信息写死，所以底层业务已实现，页面未实现。
        Long currentId = BaseContext.getCurrentId();
        if (currentId != 1){
            throw new PasswordErrorException(MessageConstant.ABC);
        }
        employeeMapper.upDate(employee);
    }

    /**
     * 根据id查询
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        return employeeMapper.geiById(id);
    }

    /**
     * 修改员工信息
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        /*employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        employeeMapper.upDate(employee);
    }

    /**
     * 修改密码
     * @param
     * @param
     * @param
     */
    @Override
    public void setPassWord(PasswordEditDTO passwordEditDTO) {
        passwordEditDTO.setEmpId(BaseContext.getCurrentId());

        Long id = passwordEditDTO.getEmpId();
        Employee employee = employeeMapper.geiById(id);
        String oldPassword = passwordEditDTO.getOldPassword();
        oldPassword = DigestUtils.md5DigestAsHex(oldPassword.getBytes());
        if (!oldPassword.equals(employee.getPassword())){
            throw new PasswordErrorException(MessageConstant.PASSWORD_EDIT_FAILED);
        }
        String newPassword = passwordEditDTO.getNewPassword();
        newPassword = DigestUtils.md5DigestAsHex(newPassword.getBytes());
        employee = Employee.builder()
                .id(passwordEditDTO.getEmpId())
                .password(newPassword)
                .build();
        employeeMapper.upDate(employee);
    }
}
